KR101420099B1 - Method and apparatus for reproducing broadcasting content and method and apparatus for providing broadcasting content - Google Patents

Abstract

The present invention relates to a method and apparatus for reproducing broadcast content on a digital TV, and a method and apparatus for providing broadcast content to a digital TV, and a method for reproducing a real time broadcast content by a digital TV, The receiver controls the playback of the content to be suspended, stores the packets received after the playback is suspended, and the receiver acquires the error-free packet corresponding to the packet in which the error is detected, And reproduces high quality broadcast content without interruption by reproducing the content using the packets.

Broadcasting, DTV, PVR

Description

[0001] The present invention relates to a method and apparatus for reproducing broadcast content,

In particular, the present invention relates to a method and apparatus for reproducing broadcast content on a digital TV, and a method and apparatus for providing broadcast content to a digital TV. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for reproducing broadcast content.

A digital television receiver receives a packet-type data stream from a broadcasting station providing a broadcasting service, and reproduces the broadcasting content using the received data stream. However, noise may be added to the data stream transmitted from the broadcasting station in accordance with the surrounding environment such as the communication condition of the broadcasting station and the television receiving period. Therefore, a user in a poor communication environment such as a tunnel receives a data stream with a lot of noise, and the quality of the broadcast content to be reproduced is deteriorated in proportion to the amount of noise. Particularly, when the television receiver receives and reproduces a noisy data stream, the screen may be cut off or a distorted picture or sound may be reproduced during reproduction.

FIG. 1A shows a data stream 110 transmitted by a broadcast transmission station according to the prior art.

It is assumed that the data stream 110 transmitted from the broadcast transmission station is composed of N packets. There is no noise in the data stream 110 transmitted at the broadcast transmission station first.

1B shows a data stream 120 received by a user terminal according to the prior art.

Noise is added to the data stream 120 received from the broadcasting station and there may be a fatal error in some packets 120-3 and 120-n due to such noise. In order for the user terminal to reproduce the content, data should be extracted from the received packets. However, data can not be extracted from some packets 120-3 and 120-n in which fatal errors exist, or distorted data can be extracted. This results in a problem that the content is reproduced in the user terminal or the distorted video or audio is reproduced.

If a conventional user terminal is used, even if there is an error in the received packet and the picture quality is poor or even if viewing is impossible, the user can not take any additional measures and can not watch the broadcast. Even if the reception environment is improved later, the viewer can not view the distorted image or the broken image before the reception environment is improved. Therefore, there is a problem that a portion that can not be watched due to an error can not be watched forever by using the user terminal.

Such a problem is more serious in the case of a user terminal receiving a broadcast while moving, such as DMB (Digital Multimedia Broadcasting). In the case of a user terminal that receives a broadcast while moving, the reception environment changes frequently depending on the moving destination, and thus the broadcast is often interrupted, distorted images are frequently reproduced, and the user can not properly watch the broadcast.

An object of the present invention is to provide a broadcast content playback method and a broadcast content playback method capable of playing back broadcast content without causing interruption or distortion, and a broadcast content providing method for playing back broadcast content without causing interruption or distortion in the user terminal And a device therefor.

According to an aspect of the present invention, there is provided a method of reproducing a real time broadcast content by a digital TV, the method comprising: when an error is detected in a packet constituting the broadcast content, ; Storing packets received after the playback is stopped; Re-receiving an error-free packet corresponding to the packet in which the error was detected; And reproducing the content using the re-received packet and the stored packets.

Requesting transmission of an error-free packet corresponding to a packet in which the error is detected, from the server storing packets constituting the broadcast content; And re-receiving the error-free packet corresponding to the packet in which the error is detected, using the external communication network, in response to the request.

Wherein the step of re-receiving comprises: receiving packets constituting the broadcast content after a predetermined time delay; And obtaining an error-free packet corresponding to the packet in which the error is detected from the packets received after the predetermined time delay.

A packet in which an error is detected can be detected based on header information of the packet.

Wherein the reproducing step comprises: replacing a packet in which an error has been detected among the stored packets with the re-received packet; And reproducing the broadcast content using the packets replaced with the re-received packet.

According to another aspect of the present invention, there is provided a method of providing broadcast content to a user terminal, the method comprising: receiving packets transmitted from a broadcast transmitter providing real-time broadcast content to the user terminal from the broadcast transmitter; And transmitting, to the user terminal, packets having an error among the packets transmitted to the user terminal using an external communication network.

According to another aspect of the present invention, there is provided an apparatus for playing back real-time broadcast content in a digital TV, the apparatus comprising: a control unit for controlling the playback of the content to be stopped when an error is detected in a packet constituting the broadcast content; A database for storing packets received after the reproduction is stopped; A re-reception unit for re-receiving a packet having no error corresponding to the packet in which the error is detected; And a playback unit for playing back the content using the re-received packet and the stored packets.

According to another aspect of the present invention, there is provided an apparatus for providing broadcast content to a user terminal, the apparatus comprising: a receiver for receiving packets transmitted from a broadcast transmitter for providing real-time broadcast content to the user terminal; And a transmission unit for transmitting packets of the packets transmitted to the user terminal to the user terminal using an external communication network.

There is an effect of viewing high quality broadcast content by re-receiving a packet in which an error exists.

If there is an error in the packet, the packet is stored first. If the packet corresponding to the packet in which the error exists is received, the packet is reproduced together with the stored packet, so that the broadcast content is continuously viewed even in a poor reception environment.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 2 shows a block diagram of an embodiment of a broadcast content playback apparatus 200 according to the present invention.

The broadcast content reproducing apparatus 200 according to the present invention includes a control unit 210, a database 220, a packet acquisition unit 230, and a playback unit 240.

When an error is detected in the packet constituting the broadcast content, the control unit 210 controls the playback of the content to be temporarily stopped. In order to determine whether an error is detected in a packet constituting the broadcast content, the broadcast content reproducing apparatus 200 may have a separate determination unit (not shown). In this case, if an error is detected in the packet based on the determination result of the determination unit (not shown), the control unit 210 controls the playback unit 240 to temporarily stop the playback of the broadcast content.

In addition, the control unit 210 may determine whether or not an error is detected in a packet constituting the broadcast content. In this case, the control unit 210 determines whether or not an error is directly detected in the packet and controls the reproducing unit 240.

 Whether or not an error exists in the packet constituting the broadcast content can be judged based on the header information of the packet. For example, it is determined whether there is an error in the packet based on the PCR, the PID, and the continuity counter included in the header information.

The broadcast content reproducing apparatus 200 according to the present invention may further include a receiving unit (not shown). The receiving unit (not shown) receives the packets constituting the broadcast content from the broadcast transmitting station and transmits the received packets to the database 220 to store the packets, or transmits the packets to the reproducing unit 240, .

For example, when there is an error in the third packet among the packets constituting the broadcast content, the receiving unit (not shown) transmits the first packet and the second packet to the reproducing unit 240 so that the broadcast content is reproduced in real time . In addition, the receiving unit (not shown) may transmit the third and subsequent packets to the database 220 for storage.

In the database 220, packets received after the reproduction is stopped are stored. For example, if there is an error in the third packet among the packets constituting the broadcast content, the fourth packet is stored in the database 220.

 The packet acquisition unit 230 acquires an errorless packet corresponding to the packet in which the error is detected. There are various methods for the packet acquisition unit 230 to acquire the packet.

For example, the packet acquisition unit 230 may receive a packet corresponding to a packet in which an error is detected from an external server storing packets constituting the content reproduced in the user terminal. A broadcast content playback apparatus 200 for acquiring a packet from an external server according to the present invention will be described later in detail with reference to FIG.

The packet acquisition unit 230 includes a tuner different from the tuner used in the reception unit (not shown), so that the packet corresponding to the packet in which the error is detected by using the packets re-received from the broadcast transmission station, Can be acquired. In this case, the packet acquisition unit 230 may include a tuner (not shown) and a packet extraction unit (not shown).

When the packet acquisition unit 230 acquires a packet from a broadcasting station, the tuner (not shown) uses a frequency different from the frequency used by the receiving unit (not shown). Accordingly, the broadcasting station must have a first channel for transmitting packets to the receiver and a second channel for transmitting packets to a tuner (not shown) in the packet acquisition unit 230.

The broadcasting station transmits packets using the first channel, and after a predetermined time delay, transmits the same packets to a tuner (not shown) in the packet acquisition unit 230 using the second channel. For example, packets constituting the broadcast content may be transmitted to a receiver (not shown), and the same packets may be transmitted to a tuner (not shown) in the packet acquisition unit 230 after 10 seconds have elapsed. In this case, the broadcasting station transmits packets constituting the broadcast content using the first channel, and transmits the same packets using the second channel after 10 seconds.

A packet extracting unit (not shown) extracts an errorless packet corresponding to a packet in which an error is detected from packets received by a tuner (not shown) after a predetermined time delay. And extracts and uses only necessary packets among the packets received by the tuner (not shown). A broadcast content playback apparatus 200 for acquiring a packet from a broadcast station according to the present invention will be described in detail later with reference to FIG.

The playback unit 240 plays the broadcast content in real time using the received packets until an error exists in the packets received by the receiver (not shown). However, if there is an error in the packets received by the receiving unit (not shown), the reproduction of the broadcast content is temporarily stopped. Thereafter, when the packet acquiring unit 230 acquires an error-free packet corresponding to the packet in which the error is detected, the content is reproduced using the acquired packet and the packets stored in the database 220.

The playback unit 240 may include a replacement unit 242 and a content playback unit 244. [

The replacement unit 242 replaces the packet in which the error is detected among the packets stored in the database 220 with the packet acquired by the packet acquisition unit 230. [ For example, if 'N' packets are stored in the database 220, and there is an error in the first packet and the tenth packet, the first packet and the tenth packet are transmitted to the packet acquisition unit 230 Lt; / RTI >

The content reproduction unit 244 reproduces the broadcast content using the packets stored in the database 220, which replace the packet in which the error is detected by the packet acquired by the packet acquisition unit 230. [ Since the packets having errors are all replaced with the packets acquired by the packet acquisition unit 230, the quality of the broadcast content to be reproduced is excellent.

FIG. 3 shows an embodiment of a broadcast content playback apparatus 200 using an external server according to the present invention.

The receiving unit 310 receives the packets constituting the broadcast content to be reproduced from the broadcast content reproducing apparatus 200 from the broadcast transmitting station.

When an error is detected in the packets received by the receiving unit 310, the control unit 210 temporarily stops the reproduction of the content. The control unit 210 may determine whether or not an error exists for each packet received by the receiving unit 310, and may determine whether or not an error exists for a predetermined number of packets. When an error is detected in the received packets, the control unit 210 controls the playback unit 240 to temporarily stop the playback of the content, and after the playback is temporarily stopped, (220). And simultaneously controls the packet acquisition unit 230 to acquire a packet corresponding to a packet in which an error exists from an external server.

The packet acquisition unit 230 acquires a packet corresponding to a packet in which an error exists from the external server. The packet acquisition unit 230 may include a transmission request unit 232 and a packet reception unit 234. [

The transmission request unit 232 requests transmission of an error-free packet corresponding to a packet in which an error is detected from an external server storing packets constituting the content. That is, the control unit 210 requests the external server again for the packet in which the error exists. The transmission request unit 232 can request a desired packet by transmitting header information or the like of a packet in which an error exists to the external server and specifying the packet. In this case, the server in which the packets constituting the content are stored may be a server operated by a broadcasting station, or a server by a third party which is not related to a broadcasting station.

In response to the request of the transmission request unit 232, the packet receiving unit 234 receives an error-free packet corresponding to the packet in which the error is detected, using the external communication network. The packet receiving unit 234 can easily obtain a desired packet regardless of the broadcast receiving environment by using the external communication network. The external communication network that the packet receiver 234 can use is various such as Wibro, HSDPA, wireless LAN, and WCDMA.

 The playback unit 240 plays back the content using the packets acquired by the packet acquisition unit 230 and the packets stored in the database 220. [ The reproducing unit 240 may include a demultiplexing unit 245, a decoder unit 246, and an output device 247. The demultiplexer 245 demultiplexes the packets and transmits them to the decoder 246. The decoder 246 may include an audio decoder (not shown) and a video decoder (not shown), and an audio decoder (not shown) may receive and decode audio packets and a video decoder Decode it.

The output device 247 outputs the content using the decoded data. The output device 247 may include a monitor and a speaker, the monitor outputs video data, and the speaker outputs audio data.

Fig. 4 shows an example of packet processing in the broadcast content playback apparatus 200 for acquiring a packet corresponding to an error packet from the above-described external server in Fig.

The receiving unit 310 receives, in real time, packets related to the content 410 to be reproduced in the broadcast content reproducing apparatus 200 from the broadcast transmitting station. An error exists in the 13th packet 410-13, the 21st packet 410-21 and the 22nd packet 410-22 of the packets 410 received in real time.

The control unit 210 controls the playback of the content to be temporarily stopped when there is an error in the received packets. It is assumed that the control unit 210 determines whether there is an error in the received packets, and the control unit 210 determines whether there is an error for every five packets. In the present embodiment, the control unit 210 checks whether there is an error packet for every five packets, but it may also determine whether or not an error exists for each packet.

The control unit 210 determines whether there is an error in the packets from the first packet 410-1 to the fifth packet 410-5. Since there is no error in the corresponding interval, the playback unit 240 plays back the content based on the packets from the first packet 410-1 to the fifth packet 410-5.

The control unit 210 determines whether there is an error in the packets from the sixth packet 410-6 to the tenth packet 410-10. Since there is no error in the corresponding period, the reproducing unit 240 reproduces the content based on the packets from the sixth packet 410-6 to the tenth packet 410-10.

The control unit 210 determines whether there is an error in the packets from the 11th packet 410-11 to the 15th packet 410-15. Since there is an error in the 13th packet 410-13, the control unit 210 controls the playback unit 240 to temporarily stop the playback of the content. At the same time, packets received after the eleventh packet 410-11 are stored in the database 220 (410-11 to 410-22).

The packet acquiring unit 230 acquires again the thirteenth packet 420-13 having no error corresponding to the thirteenth packet 410-13 from the external server.

When the packet acquisition unit 230 acquires the thirteenth packet 420-13 with no error, the playback unit 240 receives the packets stored in the storage unit and the thirteenth packet 420-13 ) To reproduce the content.

The receiving unit 310 continues to receive the next packets in real time and stores them in the database 220 while the packet obtaining unit 230 obtains the thirteenth packet 420-13 using the external communication network. The control unit 210 also checks the packets received by the receiving unit 310 in units of five while the packet acquisition unit 230 acquires the thirteenth packet 420-13 using the external communication network Continue to detect.

The control unit 210 determines whether there is an error in the packets from the 21st packet 410-21 to the 25th packet 410-25. Since there is an error in the 21st packet 410-21 and the 22nd packet 410-22, the packet acquiring unit 230 acquires an error corresponding to the 21st packet 410-21 and the 22nd packet 410-22 It is necessary to acquire the twenty-first packet 420-21 and the twenty-second packet 420-22 which have no error.

However, when the packet acquisition unit 230 temporarily stops the reproduction of the content while the playback unit 240 obtains the thirteenth packet 420-13, the packet received by the reception unit 310 in real time and the packet received by the playback unit 240 A time difference occurs between the packets reproduced by the mobile terminal. This is because the playback unit 240 can continuously play back the content using the packets stored in the database 220 even while the packet acquisition unit 230 acquires the 21st packet 420-21 and the 22nd packet 420-22 . Accordingly, even if an error is detected in the 21st packet 420-21, the control unit 210 does not need to control the deactivating unit 240 to stop the reproduction of the content. Therefore, the content is continuously reproduced.

For example, when the packet acquisition unit 230 takes 5 seconds to acquire the 13th packet 420-13, the playback unit 240 temporarily stops the playback of the content for 5 seconds. However, during this period, the receiving unit 310 continuously receives the packets in real time, and the control unit 210 determines whether there is an error in the received packets. It is assumed that the 20th packet 410-20 is received by the reception unit 310 at the time when the packet acquisition unit 230 acquires the 13th packet 420-13.

Packets from the eleventh packet 410-11 to the twentieth packet 410-20 are stored in the database 220 at the time when the packet acquisition unit 230 acquires the thirteenth packet 420-13. While the reproducing unit 240 reproduces the content using the packets stored in the database 220 and the 13th packet 420-13 acquired by the packet acquiring unit 230, the receiving unit 310 receives the 21st packet 410 -21) to the 25th packet 410-25. Accordingly, the control unit 210 detects the 21st packet 410-21 and the 22nd packet 410-22 as a packet in which an error exists. Therefore, the packet acquisition unit 230 must acquire the 21st packet 420-21 and the 22nd packet 420-22 from the external server. However, even when the packet acquisition unit 230 acquires the 21st packet 420-21 and the 22nd packet 420-22 from the external server, the playback unit 240 may also receive the packets stored in the database 220, The acquisition unit 230 continuously reproduces the content using the acquired thirteenth packet 420-13.

However, if the playback unit 240 receives all of the 11th packet 410-11 stored in the database 220, the 20th packet 410-20 and the 13th packet 420-13 acquired by the packet acquisition unit 230 The packet acquisition unit 230 may not be able to acquire the 21st packet 420-21 and the 22nd packet 420-22 that have no error even though the content is reproduced. In this case, the control unit 210 controls the playback unit 240 to stop the playback of the content until the packet acquisition unit 230 acquires the 21st packet 420-21 and the 22nd packet 420-22 can do.

In this embodiment, the broadcast content is reproduced in real time from the moment when the user turns on the power of the broadcast content playback apparatus 200 until an error is detected for the first time in the received packet. Therefore, if a packet having an error is detected for the first time, the reproduction of the content is temporarily stopped until the packet corresponding to the packet in which the error is detected is received again. In order to reduce the time for stopping the playback of the content, the broadcast content playback apparatus 200 according to the present invention can set a transport channel with an external server from the moment the packet is received. There are a variety of methods for setting the external channel and the transport channel. When the broadcast content playback apparatus 200 requests the external server for user authentication and the request is accepted, the packets constituting the content are transmitted to the broadcast content playback apparatus 200 It is possible to set the transmission channel in advance so that it can be transmitted.

However, even when the user turns on the power of the broadcast content playback apparatus 200, the user can receive the packets in real time from the broadcasting station and wait until the certain packets are stored in the database 220 without reproducing the content. For example, it is assumed that when the packets from the first packet 420-1 to the 20th packet 420-20 are stored in the database 220, the playback unit 240 starts playback of the content. In this case, even when the packet acquisition unit 230 acquires the error-free packet 420-21 corresponding to the received 21st packet 410-21, the playback unit 240 also stores the error- The packets can be used to continuously reproduce the content.

Through the above process, the reproducing unit 240 generates the error-free packets 430 using the packets 410 received by the receiving unit 310 and the packets 420 acquired by the packet obtaining unit 230 And reproduces the content using the error-free packets 430, so that the user can watch the broadcast content without interruption.

FIG. 5 shows an embodiment of packet processing by a broadcast content playback apparatus 200 for re-receiving a packet from a broadcasting station according to the present invention.

The first tuner 510 receives packets 520 related to the content to be reproduced from the broadcasting station. The playback unit 540 processes the packets 520 received by the first tuner 510 to play back the content. The third packet 520-3, the twenty-first packet 520-21, and the twenty-second packet 520-22 of the packets 520 received by the first tuner 510 are packets in which an error exists.

The second tuner 530 re-receives the packets 540 related to the same content from the broadcasting station with a predetermined time lag. For example, it is assumed that the second tuner 530 re-receives packets transmitted to the first tuner 510 at intervals of 10 seconds.

In the case where the broadcast content reproducing apparatus 200 moves as in the case where the user uses the broadcast content reproducing apparatus 200 in the vehicle, the receiving environment of 10 seconds before and the receiving environment after 10 seconds may be different, There may be a difference between the packets 520 received by the first tuner 510 and the packets 540 received by the second tuner 530. The second packet 540-2 and the 20th packet 540-20 of the packets 540 received by the second tuner 530 are packets in which an error exists.

 The playback unit 240 plays back the content using the packets 520 received by the first tuner 510. If an error is detected in the packets 520 received by the first tuner 510, the control unit 210 temporarily stops the reproduction of the content and stores the packets received thereafter. Thus, packets after the third packet 520-3 are stored in the database 220. [

The packet acquisition unit 230 acquires the third packet 540-3 of the packets 540 received by the second tuner 530 after elapse of 10 seconds. When the second tuner 530 acquires the third packet 540-3, the reproducing unit 240 transmits the third packet 540-3 received by the first tuner 510 and the third packet 540-3 received by the second tuner 530 And compares the received third packet 540-3 to select an excellent packet. When an excellent packet is selected, the playback unit 240 plays back the content using the packet. As shown in FIG. 5, in the case of re-receiving a packet from a broadcasting station, packets transmitted to the first tuner 510 and the second tuner 520 are compared with each other even when there is only a small error in the packet And the quality of the reproduced content can be better because the content is reproduced by using it. Thereafter, when there is an error in the packets, it operates in the same way as in FIG. 4, and the description will be omitted.

Figure 6 shows a block diagram of an embodiment of an apparatus 600 for providing broadcast content in accordance with the present invention.

The apparatus 600 for providing broadcast content according to the present invention includes a receiving unit 620 and a transmitting unit 630.

The receiving unit 620 receives the packets transmitted from the broadcasting transmitting station 610 providing the real time broadcasting contents to the user terminal 640 from the broadcasting transmitting station 610. That is, it receives the packets transmitted to the user terminal 640 from the broadcast transmitting station 610. The receiving unit 620 may further include a database (not shown), and the packets received by the receiving unit 620 may be stored in a database (not shown).

The transmission unit 630 transmits packets having errors from the packets transmitted from the broadcast transmission station 610 to the user terminal 640 through the external communication network to the user terminal 640. The transmitter 640 may obtain information about whether packets have been successfully transmitted to the user terminal 640 and may transmit error packets to the user terminal 640 via the external communication network. The user terminal 640 or the broadcast transmitting station 610 receives a transmission request for a packet having an error among the packets transmitted to the user terminal 640 and transmits the requested packets to the user terminal 640 ). In this case, the transmitting unit 630 includes a transmission request information receiving unit 632 and a packet transmitting unit 634.

The transmission request information receiving unit 632 receives from the user terminal 640 information requesting transmission of an error packet among the packets received by the user terminal 640.

The packet transmitting unit 634 transmits a packet corresponding to the transmission request information among the broadcast packets received from the broadcasting transmitting station 610 to the user terminal 640.

7 shows a flowchart of a broadcast content playback method according to the present invention.

In step s710, if an error is detected in the packet constituting the broadcast content, the reproduction of the content is stopped.

In step s720, packets received after the reproduction is stopped are stored.

In step s730, an error-free packet corresponding to the packet in which the error is detected is acquired.

Step s730 is a step of requesting transmission of an error-free packet corresponding to a packet in which an error is detected from the server in which no error-related packets relating to the content are stored, and in response to the request, By using an external communication network.

Also, it can be performed by receiving the packets constituting the broadcast content after a predetermined time delay, and obtaining an error-free packet corresponding to the error packet detected from the packets received after a predetermined time delay.

In step s740, when a packet having no error corresponding to the packet in which the error is detected is acquired, the content is reproduced using the acquired packet and the stored packets.

Step s740 may be performed by steps s742 and s744.

In step s742, the received packet is replaced with the acquired packet.

In step s744, the broadcast content is reproduced using the stored packets in which the packet in which the error exists is replaced with the acquired packet.

FIG. 8 shows a flowchart of an embodiment of a broadcast content providing method according to the present invention.

In step s810, packets transmitted to the user terminal from the broadcasting transmitting station providing the real-time broadcasting content are received from the broadcasting transmitting station.

In step s820, error packets among the packets transmitted to the user terminal are transmitted to the user terminal using the external communication network.

Step s820 may be performed by receiving the transmission request information related to the error packet among the packets received by the user terminal from the user terminal and transmitting a packet corresponding to the transmission request information among the broadcast packets received from the broadcasting transmission station to the user terminal have.

9 is a flowchart illustrating an embodiment of a broadcast content providing and playback method according to the present invention.

The broadcast transmitting station 610 transmits packets related to the content to be reproduced in the broadcast content reproducing apparatus 930. (s901) At the same time, the same packets as the packets transmitted to the broadcast content reproducing apparatus 930 are transmitted to the external server 920 So that the external server 920 can store the packets (S902)

If an error is detected in the packets received from the broadcast transmission station 610, the user terminal 930 temporarily stops the reproduction of the content (s903). [0080] Further, after the user terminal 930 temporarily stops the reproduction of the content And stores the packets received from the broadcasting station 610 (S904)

The user terminal 930 transmits the transmission request information for receiving the packet in which the error is detected to the external server 920. (s905)

The external server 920 transmits the packet requested by the user terminal 930 to the user terminal 930 based on the transmission request information from the user terminal 930. (s906)

The user terminal 930 reproduces the content using the packets and stored packets obtained from the external server 920 (S907)

Throughout this specification, the user terminal is a digital TV, and the broadcast signal transmitted to the user terminal is in the form of a packet. However, the present invention is not limited thereto, and can be applied to a case where a broadcast signal is transmitted as an analog signal. For example, it is possible to determine whether there is an error in the analog signal transmitted to the user terminal at every predetermined interval, and to re-receive the analog signal for the section in which the error exists.

The above-described embodiments of the present invention can be embodied in a general-purpose digital computer that can be embodied as a program that can be executed by a computer and operates the program using a computer-readable recording medium.

The computer readable recording medium may be a magnetic storage medium such as a ROM, a floppy disk, a hard disk, etc., an optical reading medium such as a CD-ROM or a DVD and a carrier wave such as the Internet Lt; / RTI > transmission).

The present invention has been described with reference to the preferred embodiments. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is defined by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.

FIG. 1A shows a data stream 110 transmitted by a broadcast transmission station according to the prior art.

1B shows a data stream 120 received by a user terminal according to the prior art.

FIG. 2 shows a block diagram of an embodiment of an apparatus 200 for providing broadcast content according to the present invention.

FIG. 3 shows an embodiment of a broadcast content playback apparatus 200 using an external server according to the present invention.

FIG. 4 shows an embodiment of packet processing in the broadcast content playback apparatus 200 according to the present invention.

FIG. 5 shows an embodiment of packet processing by a broadcast content playback apparatus 200 for re-receiving a packet from a broadcasting station according to the present invention.

Figure 6 shows a block diagram of an embodiment of an apparatus 600 for providing broadcast content in accordance with the present invention.

7 is a flowchart illustrating a broadcast content providing method according to the present invention.

FIG. 8 shows a flowchart of an embodiment of a broadcast content providing method according to the present invention.

9 is a flowchart illustrating an embodiment of a broadcast content providing and playback method according to the present invention.

Claims (15)

A method of playing a real time broadcast content by a receiver, Controlling the playback of the content to be temporarily stopped when an error is detected in a packet constituting the broadcast content received through the broadcast communication network; Storing packets received through the broadcast communication network after the playback is suspended; Obtaining an error-free packet corresponding to a packet in which the error is detected through an external communication network different from the broadcasting communication network; And And reproducing the content using the acquired packet and the stored packets. 2. The method according to claim 1, Requesting transmission of a packet corresponding to a packet in which the error is detected, from a server storing packets constituting the broadcast content; And And acquiring an error-free packet corresponding to the packet in which the error is detected using an external communication network. The method according to claim 1, Re-receiving packets constituting the real-time broadcast content after a predetermined time delay; And And acquiring an error-free packet corresponding to the packet in which the error is detected, from the packets re-received after the predetermined time delay. The method according to claim 1, Further comprising the step of determining whether an error is detected in a packet constituting the broadcast content based on header information of the packet. 2. The method of claim 1, Replacing the packet in which an error is detected among the stored packets with the acquired packet; And And reproducing the broadcast content using the stored packets that have been replaced with the acquired packet. A method for providing broadcast content to a user terminal, Receiving packets transmitted to a user terminal from a broadcast transmission station providing real-time broadcast content through a broadcast communication network; And And transmitting to the user terminal an error packet among the packets transmitted from the broadcasting station to the user terminal through the broadcasting communication network using an external communication network different from the broadcasting communication network, Delivery method. 7. The method of claim 6, Receiving, from the user terminal, transmission request information related to a packet in which an error exists among the packets received by the user terminal; And And transmitting a packet corresponding to the transmission request information among the broadcasting packets received from the broadcasting station to the user terminal. An apparatus for playing back real-time broadcast content, A control unit for temporarily stopping the reproduction of the content when an error is detected in a packet constituting the broadcast content received through a broadcast communication network; A database for storing packets received through the broadcast communication network after the playback is suspended; A packet acquiring unit for acquiring an error-free packet corresponding to the packet in which the error is detected through an external communication network different from the broadcasting communication network; And And a playback unit for playing back the content using the acquired packet and the stored packets. 9. The apparatus according to claim 8, A transmission request unit for requesting transmission of an error-free packet corresponding to a packet in which the error is detected, from a server storing packets constituting the broadcast content; And And a packet receiver for acquiring an error-free packet corresponding to the packet in which the error is detected using an external communication network. 9. The apparatus according to claim 8, A tuner for re-receiving packets constituting the real-time broadcast content after a predetermined time delay; And And a packet extracting unit for obtaining a packet corresponding to the packet in which the error is detected from the packets re-received after the predetermined time delay. 9. The method of claim 8, Further comprising a determination unit for determining whether an error is detected in a packet constituting the broadcast content based on header information of the packet. 9. The apparatus according to claim 8, A replacement unit for replacing a packet in which an error is detected among the packets stored in the database with the acquired packet; And And a content playback unit that plays back the broadcast content using the packets stored in the database, the content being replaced with the acquired packet. An apparatus for providing broadcast content to a user terminal, A receiver for receiving packets transmitted from a broadcast transmission station providing real-time broadcast content to the user terminal through a broadcast communication network; And And a transmitting unit for transmitting to the user terminal an error packet among the packets transmitted from the broadcasting transmitting station to the user terminal through the broadcasting communication network using an external communication network different from the broadcasting communication network, . 14. The apparatus of claim 13, A transmission request information receiver for receiving, from the user terminal, transmission request information about a packet among the packets received by the user terminal; And And a packet transmitter for transmitting a packet corresponding to the transmission request information among the broadcast packets received from the broadcasting station to the user terminal. A computer-readable recording medium on which a program for executing the method of any one of claims 1 to 7 is recorded.

Images